Hi, I haven't played much with Grimmnar but most people would probably say that 1000-1500pts isn't really enough points for the dude (he probably needs 2500< to really shine).
I personally favor a mechanized approach and I stand behind the notion that
SW wants to keep their enemies close but not in
CC, we want to shoot them to pieces and maybe finish them off in
CC when we see fit

. We got OK
CC units but we are not
BA! So,
IMO, try to get as many
HW and other shooty stuff in your list as possible, and don't forget to have a balance between anti infantry and anti tank weapons!
I personally prefer:
- a Wolf Lord on a TWM (frost blade &
SS) accompanied by a 4
TWC (not very shooty but its nice to have some
CC capabilities and its a quite cheap and resilient commander)
- Vindicators (just love these babies)
-
GH packs of 10 (
MOTW, 2xmelta, rhino OR 9
GH,
MOTW, 1xmelta, rhino,
WG, combimelta(,
PF), some people would probably advice you to drop the
MOTW)
- 5 man
GH packs in Razorbacks (with
LC/
AC, which is pretty neat and a great way to get more
HW into the list)
- and most people would probably tell you to get
LF packs with 4-5
ML (in a razorback), I'm not into these myself but I can see why other people are.
- Predators are always nice (
AC &
HB) as well but they always gets dropped in favor for vindicators or
LF-packs in my lists (I find a pair of them really useful at 1000pts however).
There are other ways of doing a
SW-list though, but I find that in this way you can make a versatile list which is fun to play.